Not sure how many of you are /o/ competent but I've been researching a lot of late 60's- mid 80's motor home engines and a good majority of them have some form of Big Block. It's amazing how simple older engines are compared to new ones. To me the dodge 440 seems like it's the best from what I've read, also being somewhat of a mechanic all of the things that WILL break or need replacement are IN FRONT of the engine bay where they are serviceable. Which most modern cars seem to have made as difficult as possible.

pic related, dodge 440 Big Block

tl;dr argue best engines to /out/ with